| /* ------------------------------------------------------------------ |
| * Copyright (C) 1998-2009 PacketVideo |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either |
| * express or implied. |
| * See the License for the specific language governing permissions |
| * and limitations under the License. |
| * ------------------------------------------------------------------- |
| */ |
| /* |
| |
| Filename: ps_read_data.c |
| |
| |
| ------------------------------------------------------------------------------ |
| REVISION HISTORY |
| |
| |
| Who: Date: MM/DD/YYYY |
| Description: |
| |
| ------------------------------------------------------------------------------ |
| INPUT AND OUTPUT DEFINITIONS |
| |
| |
| |
| ------------------------------------------------------------------------------ |
| FUNCTION DESCRIPTION |
| |
| Decodes parametric stereo |
| |
| ------------------------------------------------------------------------------ |
| REQUIREMENTS |
| |
| |
| ------------------------------------------------------------------------------ |
| REFERENCES |
| |
| SC 29 Software Copyright Licencing Disclaimer: |
| |
| This software module was originally developed by |
| Coding Technologies |
| |
| and edited by |
| - |
| |
| in the course of development of the ISO/IEC 13818-7 and ISO/IEC 14496-3 |
| standards for reference purposes and its performance may not have been |
| optimized. This software module is an implementation of one or more tools as |
| specified by the ISO/IEC 13818-7 and ISO/IEC 14496-3 standards. |
| ISO/IEC gives users free license to this software module or modifications |
| thereof for use in products claiming conformance to audiovisual and |
| image-coding related ITU Recommendations and/or ISO/IEC International |
| Standards. ISO/IEC gives users the same free license to this software module or |
| modifications thereof for research purposes and further ISO/IEC standardisation. |
| Those intending to use this software module in products are advised that its |
| use may infringe existing patents. ISO/IEC have no liability for use of this |
| software module or modifications thereof. Copyright is not released for |
| products that do not conform to audiovisual and image-coding related ITU |
| Recommendations and/or ISO/IEC International Standards. |
| The original developer retains full right to modify and use the code for its |
| own purpose, assign or donate the code to a third party and to inhibit third |
| parties from using the code for products that do not conform to audiovisual and |
| image-coding related ITU Recommendations and/or ISO/IEC International Standards. |
| This copyright notice must be included in all copies or derivative works. |
| Copyright (c) ISO/IEC 2003. |
| |
| ------------------------------------------------------------------------------ |
| PSEUDO-CODE |
| |
| ------------------------------------------------------------------------------ |
| */ |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; INCLUDES |
| ----------------------------------------------------------------------------*/ |
| |
| #ifdef AAC_PLUS |
| |
| #ifdef PARAMETRICSTEREO |
| |
| #include "pv_audio_type_defs.h" |
| #include "buf_getbits.h" |
| #include "s_bit_buffer.h" |
| #include "s_huffman.h" |
| #include "aac_mem_funcs.h" |
| #include "s_ps_dec.h" |
| #include "sbr_decode_huff_cw.h" |
| #include "ps_decode_bs_utils.h" |
| #include "ps_bstr_decoding.h" |
| #include "ps_read_data.h" |
| /*---------------------------------------------------------------------------- |
| ; MACROS |
| ; Define module specific macros here |
| ----------------------------------------------------------------------------*/ |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; DEFINES |
| ; Include all pre-processor statements here. Include conditional |
| ; compile variables also. |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; LOCAL FUNCTION DEFINITIONS |
| ; Function Prototype declaration |
| ----------------------------------------------------------------------------*/ |
| |
| /*---------------------------------------------------------------------------- |
| ; LOCAL STORE/BUFFER/POINTER DEFINITIONS |
| ; Variable declaration - defined here and used outside this module |
| ----------------------------------------------------------------------------*/ |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; EXTERNAL FUNCTION REFERENCES |
| ; Declare functions defined elsewhere and referenced in this module |
| ----------------------------------------------------------------------------*/ |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES |
| ; Declare variables used in this module but defined elsewhere |
| ----------------------------------------------------------------------------*/ |
| |
| /* IID & ICC Huffman codebooks */ |
| const Char aBookPsIidTimeDecode[28][2] = |
| { |
| { -64, 1 }, { -65, 2 }, { -63, 3 }, { -66, 4 }, |
| { -62, 5 }, { -67, 6 }, { -61, 7 }, { -68, 8 }, |
| { -60, 9 }, { -69, 10 }, { -59, 11 }, { -70, 12 }, |
| { -58, 13 }, { -57, 14 }, { -71, 15 }, { 16, 17 }, |
| { -56, -72 }, { 18, 21 }, { 19, 20 }, { -55, -78 }, |
| { -77, -76 }, { 22, 25 }, { 23, 24 }, { -75, -74 }, |
| { -73, -54 }, { 26, 27 }, { -53, -52 }, { -51, -50 } |
| }; |
| |
| const Char aBookPsIidFreqDecode[28][2] = |
| { |
| { -64, 1 }, { 2, 3 }, { -63, -65 }, { 4, 5 }, |
| { -62, -66 }, { 6, 7 }, { -61, -67 }, { 8, 9 }, |
| { -68, -60 }, { -59, 10 }, { -69, 11 }, { -58, 12 }, |
| { -70, 13 }, { -71, 14 }, { -57, 15 }, { 16, 17 }, |
| { -56, -72 }, { 18, 19 }, { -55, -54 }, { 20, 21 }, |
| { -73, -53 }, { 22, 24 }, { -74, 23 }, { -75, -78 }, |
| { 25, 26 }, { -77, -76 }, { -52, 27 }, { -51, -50 } |
| }; |
| |
| const Char aBookPsIccTimeDecode[14][2] = |
| { |
| { -64, 1 }, { -63, 2 }, { -65, 3 }, { -62, 4 }, |
| { -66, 5 }, { -61, 6 }, { -67, 7 }, { -60, 8 }, |
| { -68, 9 }, { -59, 10 }, { -69, 11 }, { -58, 12 }, |
| { -70, 13 }, { -71, -57 } |
| }; |
| |
| const Char aBookPsIccFreqDecode[14][2] = |
| { |
| { -64, 1 }, { -63, 2 }, { -65, 3 }, { -62, 4 }, |
| { -66, 5 }, { -61, 6 }, { -67, 7 }, { -60, 8 }, |
| { -59, 9 }, { -68, 10 }, { -58, 11 }, { -69, 12 }, |
| { -57, 13 }, { -70, -71 } |
| }; |
| |
| const Char aBookPsIidFineTimeDecode[60][2] = |
| { |
| { 1, -64 }, { -63, 2 }, { 3, -65 }, { 4, 59 }, |
| { 5, 7 }, { 6, -67 }, { -68, -60 }, { -61, 8 }, |
| { 9, 11 }, { -59, 10 }, { -70, -58 }, { 12, 41 }, |
| { 13, 20 }, { 14, -71 }, { -55, 15 }, { -53, 16 }, |
| { 17, -77 }, { 18, 19 }, { -85, -84 }, { -46, -45 }, |
| { -57, 21 }, { 22, 40 }, { 23, 29 }, { -51, 24 }, |
| { 25, 26 }, { -83, -82 }, { 27, 28 }, { -90, -38 }, |
| { -92, -91 }, { 30, 37 }, { 31, 34 }, { 32, 33 }, |
| { -35, -34 }, { -37, -36 }, { 35, 36 }, { -94, -93 }, |
| { -89, -39 }, { 38, -79 }, { 39, -81 }, { -88, -40 }, |
| { -74, -54 }, { 42, -69 }, { 43, 44 }, { -72, -56 }, |
| { 45, 52 }, { 46, 50 }, { 47, -76 }, { -49, 48 }, |
| { -47, 49 }, { -87, -41 }, { -52, 51 }, { -78, -50 }, |
| { 53, -73 }, { 54, -75 }, { 55, 57 }, { 56, -80 }, |
| { -86, -42 }, { -48, 58 }, { -44, -43 }, { -66, -62 } |
| }; |
| |
| const Char aBookPsIidFineFreqDecode[60][2] = |
| { |
| { 1, -64 }, { 2, 4 }, { 3, -65 }, { -66, -62 }, |
| { -63, 5 }, { 6, 7 }, { -67, -61 }, { 8, 9 }, |
| { -68, -60 }, { 10, 11 }, { -69, -59 }, { 12, 13 }, |
| { -70, -58 }, { 14, 18 }, { -57, 15 }, { 16, -72 }, |
| { -54, 17 }, { -75, -53 }, { 19, 37 }, { -56, 20 }, |
| { 21, -73 }, { 22, 29 }, { 23, -76 }, { 24, -78 }, |
| { 25, 28 }, { 26, 27 }, { -85, -43 }, { -83, -45 }, |
| { -81, -47 }, { -52, 30 }, { -50, 31 }, { 32, -79 }, |
| { 33, 34 }, { -82, -46 }, { 35, 36 }, { -90, -89 }, |
| { -92, -91 }, { 38, -71 }, { -55, 39 }, { 40, -74 }, |
| { 41, 50 }, { 42, -77 }, { -49, 43 }, { 44, 47 }, |
| { 45, 46 }, { -86, -42 }, { -88, -87 }, { 48, 49 }, |
| { -39, -38 }, { -41, -40 }, { -51, 51 }, { 52, 59 }, |
| { 53, 56 }, { 54, 55 }, { -35, -34 }, { -37, -36 }, |
| { 57, 58 }, { -94, -93 }, { -84, -44 }, { -80, -48 } |
| }; |
| |
| |
| |
| |
| |
| |
| /*---------------------------------------------------------------------------- |
| ; FUNCTION CODE |
| ----------------------------------------------------------------------------*/ |
| |
| Int32 ps_read_data(STRUCT_PS_DEC *ps_dec, |
| BIT_BUFFER * hBitBuf, |
| Int32 nBitsLeft) |
| |
| { |
| Int gr; |
| UInt32 env; |
| UInt32 dtFlag; |
| Int32 startbits; |
| SbrHuffman CurrentTable; |
| |
| if (!ps_dec) |
| { |
| return 0; |
| } |
| |
| startbits = GetNrBitsAvailable(hBitBuf); |
| |
| if (buf_get_1bit(hBitBuf)) /* Enable Header */ |
| { |
| ps_dec->bEnableIid = buf_get_1bit(hBitBuf); |
| |
| if (ps_dec->bEnableIid) |
| { |
| ps_dec->freqResIid = buf_getbits(hBitBuf, 3); |
| |
| if (ps_dec->freqResIid > 2) |
| { |
| ps_dec->bFineIidQ = 1; |
| ps_dec->freqResIid -= 3; |
| } |
| else |
| { |
| ps_dec->bFineIidQ = 0; |
| } |
| } |
| |
| ps_dec->bEnableIcc = buf_get_1bit(hBitBuf); |
| if (ps_dec->bEnableIcc) |
| { |
| ps_dec->freqResIcc = buf_getbits(hBitBuf, 3); |
| |
| if (ps_dec->freqResIcc > 2) |
| { |
| ps_dec->freqResIcc -= 3; |
| } |
| } |
| ps_dec->bEnableExt = buf_get_1bit(hBitBuf); |
| } |
| |
| ps_dec->bFrameClass = buf_get_1bit(hBitBuf); |
| if (ps_dec->bFrameClass == 0) |
| { |
| ps_dec->noEnv = aFixNoEnvDecode[ buf_getbits(hBitBuf, 2)]; |
| } |
| else |
| { |
| ps_dec->noEnv = 1 + buf_getbits(hBitBuf, 2); |
| for (env = 1; env < ps_dec->noEnv + 1; env++) |
| { |
| ps_dec->aEnvStartStop[env] = (buf_getbits(hBitBuf, 5)) + 1; |
| } |
| } |
| |
| if ((ps_dec->freqResIid > 2) || (ps_dec->freqResIcc > 2)) |
| { |
| |
| ps_dec->bPsDataAvail = 0; |
| |
| nBitsLeft -= startbits - GetNrBitsAvailable(hBitBuf); |
| while (nBitsLeft) |
| { |
| int i = nBitsLeft; |
| if (i > 8) |
| { |
| i = 8; |
| } |
| buf_getbits(hBitBuf, i); |
| nBitsLeft -= i; |
| } |
| return (startbits - GetNrBitsAvailable(hBitBuf)); |
| } |
| |
| if (ps_dec->bEnableIid) |
| { |
| for (env = 0; env < ps_dec->noEnv; env++) |
| { |
| dtFlag = buf_get_1bit(hBitBuf); |
| |
| if (!dtFlag) |
| { |
| if (ps_dec->bFineIidQ) |
| { |
| CurrentTable = aBookPsIidFineFreqDecode; |
| } |
| else |
| { |
| CurrentTable = aBookPsIidFreqDecode; |
| } |
| } |
| else |
| { |
| if (ps_dec->bFineIidQ) |
| { |
| CurrentTable = aBookPsIidFineTimeDecode; |
| } |
| else |
| { |
| CurrentTable = aBookPsIidTimeDecode; |
| } |
| } |
| |
| for (gr = 0; gr < aNoIidBins[ps_dec->freqResIid]; gr++) |
| { |
| ps_dec->aaIidIndex[env][gr] = sbr_decode_huff_cw(CurrentTable, hBitBuf); |
| } |
| |
| ps_dec->abIidDtFlag[env] = dtFlag; |
| } |
| } |
| |
| if (ps_dec->bEnableIcc) |
| { |
| for (env = 0; env < ps_dec->noEnv; env++) |
| { |
| dtFlag = buf_get_1bit(hBitBuf); |
| if (!dtFlag) |
| { |
| CurrentTable = aBookPsIccFreqDecode; |
| } |
| else |
| { |
| CurrentTable = aBookPsIccTimeDecode; |
| } |
| for (gr = 0; gr < aNoIccBins[ps_dec->freqResIcc]; gr++) |
| { |
| ps_dec->aaIccIndex[env][gr] = sbr_decode_huff_cw(CurrentTable, hBitBuf); |
| } |
| |
| ps_dec->abIccDtFlag[env] = dtFlag; |
| } |
| } |
| |
| if (ps_dec->bEnableExt) |
| { |
| |
| int cnt; |
| |
| cnt = (int)buf_getbits(hBitBuf, 4); |
| |
| if (cnt == 15) |
| { |
| cnt += (int)buf_getbits(hBitBuf, 8); |
| } |
| |
| hBitBuf->nrBitsRead += (cnt << 3); |
| } |
| |
| ps_dec->bPsDataAvail = 1; |
| |
| return (startbits - GetNrBitsAvailable(hBitBuf)); |
| } |
| |
| #endif |
| |
| |
| #endif |
| |
